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arXiv 2006.06208quant-phcond-mat.stat-mech
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量子相干性在能量涨落中的作用

The role of quantum coherence in energy fluctuations

S. Gherardini, A. Belenchia, M. Paternostro, A. Trombettoni

摘要:

讨论了量子相干性在开放量子系统能量涨落中的作用。为此,我们引入了一个操作协议,我们称之为端点测量方案,允许定义的能量变化的统计数据作为一个功能的能量测量后,才进行其演变。以初始能量值的额外不确定性为代价,这种方法防止了初始量子相干性的损失,并能够估计它们对能量波动的影响。我们用一个三能级量子系统与热库的相互作用来说明我们的发现。

英文摘要:

We discuss the role of quantum coherence in the energy fluctuations of open quantum systems. To this aim, we introduce an operational protocol, to which we refer to as the end-point-measurement scheme, allowing to define the statistics of energy changes as a function of energy measurements performed only after its evolution. At the price of an additional uncertainty on the value of the initial energies, this approach prevents the loss of initial quantum coherences and enables the estimation of their effects on energy fluctuations. We illustrate our findings using a three-level quantum system in interaction with thermal reservoirs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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